My dictionary of choice does list goob as a word... Heck, there's even 8 definitions!
Some are actually even pleasant!
1. goob link send redefine 32 up, 2 down
a silly, ridiculous person; a peanut-head
*you never message me
-you're always idle
-goob
http://www.urbandictionary.com/define.php?term=goob